MDR 3000 Professional Professional Moving Die Rheometer. Testing instruments. Laboratory Equipment. Software systems. Service.

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1 Testing instruments Laboratory Equipment Software systems Service Consulting

2 Contents MDR 3000 Professional 3 Overview 4 System description 5 Test chamber system 6 Test programs 8 Determinable measurements 10 Technical specification 13 R-VS R-VS 3000 Technical specification 15 MonTech Carl - Benz - Straße 11 Tel: +49 (0) info@rubber-testing.com Werkstoffprüfmaschinen GmbH D Buchen / Germany Fax: +49 (0) MDR 3000 Professional Rotorless, dynamical rotational shear Vulcameter with a closed test chamber system The MDR 3000 Professional is designed for measuring the viscoelastic properties of polymers and elastomeric compounds before, during and after cure. The acquired data is giving exact information about the processability, the cure characteristics, the cure speed, as well as the behaviour of the compound at the after-cure. The MDR 3000 Professional fulfils the complete range of all test requirements: Polymer or raw materials as well as basic, finished and cured compounds can be characterized. Besides the cure properties the cure characteristic and the processability can be determined and evaluated too. Due to the rugged and flexible construction of the MDR 3000 Professional this device can be used for extended quality controls purposes not only in the laboratory, but also directly in the production area. The high flexibility of the MDR 3000 Professional allows the user to program and execute arbitrary test sequences with the MonControl Analyses Software. Isothermal tests, non-isothermal tests, amplitude sweeps, frequency sweeps, temperature sweeps, shear rate sweeps, relaxations, retardations, hysteresis and tensile tests can be defined, as well as a combination of each sequences. 3 3

3 Overview System description Because of the very high measuring precision of the MDR 3000 Professionalsmallest variations of the ingredients can be detected in the test result data, which simplifies makes the quality control and the development of new rubber compounds a lot. Due to this there a lots of important advantages for the user: The testing instrument consists of the machine case, a PC with screen, keyboard and mouse as well as a printer. Because of the unique full metal housing the testing instrument cannot only be used in the laboratory but also directly in the production area. with only one test all essential physically characteristics can be determined. (Quality control data, cure characteristics and properties can be determined with only one test of one test sample) aration necessary is equipped with a large variety of test methods, test parameters as well as calculation and evaluation options. The following measurands can be determined: The data acquisition and the controlling of the testing instrument is made by the PC by means To protect the user a motorly operated safety shield is lowered before the test chamber is closed. Between tests the test chamber can manually be closed in a stand-by mode. A delay time for opening the safety shield can freely be configured in the software. for produced waste gas to the back of the instrument. the R-VS 3000 sample cutter for rheometers is optional available. recommended because this ensures reliable and reproducible test results. 4 5

4 Test chamber system The two test chamber halves form a closed, biconical system. That means the test chamber is formed by two conical test dies. This ensures a constant shear rate which is independent of the die radius in the sample. The test chamber is equipped with a pneumatic closing system, which moves the upper test chamber half to the lower test chamber half to completely close the test chamber and keep the test sample Optional a regulation of the pressure is available. The measurement of the reaction torque is made by a DMS torque transducer with a very high resolution which is directly mounted above the upper test die. With this transducer it is also possible to measure the current pressure in the test chamber (optional). The temperature control of both electrically heated test dies is made by the MonControl Analyses Software with a separate control system for each test die. The temperature control and temperature heating film is used - one film for each test die. The heating film has a spiral shape with different distances between the windings. Therefore a heat concentration is prevented and a uniform temperature spreading is ensured. During the test the lower die performs a sinusoidal movement with a variable amplitude and a variable frequency. This movement is generated by a high precision torque motor system with integrated ceramic bearing and precisionpath-recording which is mounted directly at the shaft of the lower die. This motor is regulated by a corresponding highresolution motor controller - this controller is freely programmable by the MonControl Analyses Software. Because of an integrated overload protection the drive will be switched of and the current test will be stopped if the maximum permitted torque is exceeded. Additional the MDR 3000 Professional is equipped with a pneumatic operated cooling system. This cooling system which is operating separately for the upper and lower test chamber makes it possible to cool down the sample within a very short time period. The cooling system can be operated with normal compressed air or with precooled compressed air either. The form and type of the temperature stabilization is generic and adjustable by the user at every step in the test program. Completely closed, biconical test chamber system: Reactiontorque Test sample MonControl Analyses Software: Isotherm test Sealing ring Motorpreset 0,2 / 0,5 / 1,0 / 3,0 Die MonControl Analyses Software: Relaxation with preheated test sample 6 7

5 Test programs Amplitude Sweep The deflection angle (Amplitude) is changed during test at a predefined frequency and temperature. The MDR 3000 Professional in combination with the MonControl Analyses Software offers a huge variety of generic test parameters, which makes it possible to determine the sample properties in a very wide range. Frequency Sweep The frequency of the oscillation is changed during test at a predefined amplitude and temperature. Temperature Sweep The temperature of the test chamber is changed during test at a predefined amplitude and frequency. Shear rate Sweep Changing of the shear rate during the examination. The shear rate sweep represents a sequence of different retardation cycles. MonControl Analyses Software: Amplitude sweep The following test parameters are freely definable by the user: optional available optional available The following test programs are available with the MDR 3000 Professional: Relaxation Relaxation describes the unstressing after a strain. Stable physical systems return to an outer perturbation over relaxation processes nearly into their ground state. The relaxation time is a time constant which is characteristic for the given relaxation process. If the quantity f(t) of the relaxations Retardation deformation the material experiences a time-dependent reversible (viscoelastic) and an irreversible (plastic) deformation. At the transition to the plastic condition the tension remains constant in the material. The force-time graph describes an e-function. If the stress is too high it comes timedependently to a break of the material. Hysteresis The change of the viscosity under influence of one constant shear gradient, depending on the duration of the influence. With increasing duration of the influence by the shear force the hysteresis effect is increasingly irreversible. The MonControl Analyses Software enables the user to configure, combineand execute the respective tests. After inserting the test sample the actual test sequence is executed fully automatic without any intervention of the operator. Tensile test A material identification value which indicates the lasting prolongation of the break related to the initial measuring length. and many test programs more

6 Oscillation as a function of the frequency Elastic Torque Viscous Torque storage modulus G S The peak amplitude torque component which is in phase with a sinusoidally. S The peak amplitude torque which is 90 out of phase with a sinusoidally. loss Modulus G Complex Torque Loss Factor Time viskosity η loss angle δ angular frequency S* 2 2 ) The peak amplitude torque response measured by a reaction torque transducer for a sinusoidally. Tan-Delta The ration of loss modulus to storage modulus, or the ration of viscous torque to elastic torque. tan delta = = Modulation with a constant speed amplitude Storage Shear Modulus Loss Shear Modulus storage modulus G loss modulus G G G The ratio of (elastic) peak amplitude shear stress to peak amplitude shear strain for the torque component in phase with a sinusoidally applied strain. Area Peak Strain The ratio of (viscous) peak amplitude shear stress to peak amplitude shear strain for the torque component 90 out of phase with a sinusoidally. Area Peak Strain Time angular frequency Complex Shear Modulus Pressure (optional available) Modulation with a superimposed shear storage modulus G G* P The ratio of peak amplitude shear stress to peak amplitude shear strain. Area Peak Strain The axial load exerted on the die during the test. Loss Angle Time γ 0 loss anlge δ angular frequency δ The phase angle by which the sinusoidally 10 11

7 Real Dynamic Viscosity n n* The ratio of the loss shear modulus, in rad/s. Dynamic Complex Viscosity The ratio of the complex shear frequency in rad/s. Technical specification International standards Test chamber Biconical, closed System Imaginary Dynamic Viscosity n V (lin,log) The ratio of the storage shear frequency in rad/s. Vulcanisation speed st derivation of the Test chamber gap Force measurement Torque transducer mounted at the upper test chamber Pressure measurement optional Closing system Soft closing to prevent foil rips and damage of test samples Oscillation frequency Oscillation amplitude 0,01 to 20 Torque range Further derived measurements Sample volume 3 Compliance 1 2 Modulus under extension/compression measured stress 2 calculated viscous stress calculated elastic stress Temperature control system Temperature check system Units of measure Subroutines Room temperature to 230 C, precision +/ C microprocessor controlled (Pneumatic double channel cooling system standard) Recordings of the temperature gradient on the screen, microprocessor monitored Compliance under extension/compression Pneumatics Electrical measured stress calculated viscous stress calculated elastic stress Rugged solid metal case, heavy-duty type Connection possibility for suction (ø 100 mm) Net weight approx. 230 kg 12 13

8 R-VS 3000 Rheometer - volume cutter The Rheometer volume cutter Technical specification serves fast and exact production of test samples for the Rheometer Cutting - diameter This volume cutter works with a doubly working pneumatic cylinder system. This always ensures an equal volume of the test samples. The volume adjustment is made very simple by the adjusting ring underneath the stamp. Max. thickness 12 mm Reproducibility 0,1 % Sample-volume (adjustable) Compression - time (adjustable) safety operation system. Dimensions (H x W x D) Weight Pneumatics The production of Rheometer test samples is made in two steps: and certain (Informations.) too. The information is given alone in the acceptance that the receiver before their use clarifi es, whether the information for the ranges of application intended by it is, it products or process engineering (. products or process engineering) is applicable. MonTech does not take over adhesion, directly from which argument, for damage, which results from the fact that the customer trusted in the given information or on the product or process engineering described in the information. It is to be examined thing of the receiver whether by the given information or, on use of the products or process engineering described in the information, patents third are hurt. MonTech does not assure anyhow that by use of the information no patents are hurt. With exception of the reduced guarantee for the rubber and india rubber test equipment and equipment agreed upon in the sales contracts of MonTech MonTech secures thus neither too nor ensures MonTech that any of the given information and the products described in the information or process engineering. 1. for by the receiver intended using possibilities or in connection with other devices or information are applicable or 2nd purpose always constituted for one like to be used can. If the given information or the products and process engineering, to which in the information is referred, article of negotiations and a sales contract locked due to these negotiations become, are considered them only then of contract and the height after with the value of the supplied commodity limited. The replacement of escaped profi t is at all impossible. Compression of the material to a constant volume Cutting of the test sample The MonTech material test equipment GmbH is Certified according to DIN ISO Accredited according to DIN EN ISO/IEC 17025:2005 Volume adjustment Pressure arm Machine table Cutting knife 14 15

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